What are Index Funds and ETFs

The Exchange-Traded Fund (ETF) industry crossed ₹10 lakh crore in asset management in 2025. Passive funds (index funds + ETFs), on the other hand, crossed ₹12.1 lakh crore. This means that index funds and ETFs were two of the most in-demand investment instruments in 2026.

While the stock market allows you to build and grow wealth, there are stocks whose prices make investing in them difficult. In this situation, index funds and ETFs offer a structured and diversified and low-cost way to get market exposure to high-return opportunities. However, investments involve risk and are the responsibility of the investor. In this blog, we will understand what are index funds and ETFs, and why you must add them to your portfolio.

What Are Index Funds and ETFs?

Index funds and ETFs are both created to track the market, and not predict it. They provide a low-cost way of investing in a wide portfolio of securities in a single product. They also provide diversified market exposure by tracking an index.

What is an Index Fund?

An index fund is a type of mutual fund that follows a specific market index, like the Nifty 50 or the S&P 500. It achieves this through investing in the same securities as the index, in the same proportion. The objective of the index fund is simple:

• Deliver returns that are close to the index, before costs.
• Ensure that investors have to make no decisions on the stocks to buy or sell.

For example, the Nifty 50 is an index of the 50 largest and most liquid companies listed on the National Stock Exchange (NSE) of India. The fund buys all 50 Nifty companies in the same proportion as the index. If the Nifty 50 rises 10% over the year, your ₹100,000 may increase to approximately ₹110,000, before fees and taxes, noting that past performance is not indicative of future results.

What is an ETF?

An ETF (Exchange Traded Fund) is a type of funds that invest in a diversified basket of assets, like stocks, bonds, or commodities. It offers low-cost, high-liquidity exposure to specific indices or sectors. It is also an index tracker that trades on the stock exchange like a share and can be sold or purchased at market prices during market hours. An ETF combines:

• Diversification of a fund.
• Flexibility in the trading of a stock.

For example, a Nifty 50 ETF is an exchange-traded fund that holds all 50 companies in the Nifty 50 in the same proportion as the index. You can buy or sell it on the stock exchange like a share. If the Nifty 50 rises 10% over the year, your ₹100,000 investment in the ETF may increase to approximately ₹110,000 before fees and taxes. Investment returns are not guaranteed.

Both ETFs and index funds are constructed on passive investment. This means that you don't have to select the stocks, time the market, or attempt to beat the index. Passive investing does not guarantee a profit or protect against losses.

How Index Funds Work

An index is a well-chosen set of stocks that represents a part of the market. For example Nifty 50 reflects a free-floated collection of the 50 largest companies of India. Indexes serve as market performance standards. They are not directly traded, but they indicate the performance of a segment of the market over a period of time.

How an Index Fund Replicates an Index

An index fund purchases the same stocks in the same percentage as the index it is tracking. An example is that when a stock constitutes 5% of the Nifty 50, the fund allocates about 5% of its portfolio to the stock. This is a passive replication that makes the returns of the fund track the index. Tracking is generally close, but minor deviations (tracking errors) can occur.

NAV-Based Pricing and End-of-Day Transactions

Index funds are mutual funds, hence they are valued at the end of each trading day by Net Asset Value (NAV). At the end of the day, you can purchase or sell units. However, you cannot trade an index fund in the market hours, as is the case with ETFs. It is a simple structure to invest in and to maintain low costs, as no active trading and market-timing activities are involved. Costs, fees, and taxes may affect net returns.

How ETFs Work

An ETF (Exchange Traded Fund) is like an index fund, except that it tracks an index or asset class in the market. The major distinction is that it is traded in the stock exchange as a share. This implies that you can purchase or sell an ETF at any time of the day, as opposed to an index fund that is priced at the end of the day. Market price may differ slightly from the underlying NAV.

Intraday Pricing and Liquidity Mechanics

ETFs are traded in real-time, and their prices change during the trading day based on the supply and demand in the market. Investors who trade the ETF and institutions that create or redeem ETF units are the sources of liquidity.

The majority of ETFs are closely pegged to the value of their underlying index, and therefore, market prices remain close to the actual holdings of the fund. Most ETFs closely track the value of their underlying index, so market prices stay near the fund’s actual holdings. Liquidity, market volatility, and trading volume can affect execution prices and the ability to buy or sell ETF units.

Role of Demat and Trading Accounts

As ETFs are traded as stocks, investors require:

• An ETF unit demat account to store the ETF units electronically.
• An exchange account to either sell or purchase them.
• Buying ETFs is just like buying a share, yet the assets are diversified across the index.

Investors should understand the operational requirements before investing.

Index Fund vs ETF: Key Differences

Although both index funds and ETFs are designed to track an index, their construction and mechanics have practical differences for investors. These differences are not concerned with anticipated returns but rather with the way you get into the market.

Index funds are easier to invest in and are best suited to systematic long-term investment. ETFs, on the other hand, are flexible in terms of intraday trading and can be applied to long-term and tactical investments. Past performance is not indicative of future results.

Key Features of Index Funds and ETFs

Although index funds and ETFs are different in nature, they both have a number of fundamental features that make them appealing to long-term investors.

1. Passive Management

Both products are rules-based and passive. It means you don't have to pick the individual stocks or time the market actively. Your portfolio directly reflects the underlying asset. All these help you match the market returns and not beat it. Passive management does not guarantee profit or protect against loss.

2. Low-Cost Structure

Individual stocks of a company are sometimes expensive to buy and invest in. For example, a single stock that Nifty 50 tracks, Tata Consultancy Services, would cost you ₹2,941 on 6th February 2026. Index funds and ETFs let you invest in all these companies without buying each stock individually.

3. High Transparency

The funds and indexes are available publicly. As an investor, you will be fully aware of the securities held in the portfolio. This approach makes tracking safe and more transparent. This directly reduces the risk of investing. Transparency does not eliminate market risk.

4. Market-Linked Returns

Returns are tied to the performance of the underlying index:

• No speculation or predictions involved
• Investors gain broad market exposure
• Returns reflect overall market trends over the long term

Returns fluctuate with market movements and are not guaranteed.

5. Predictable Tracking Behaviour

Both index funds and ETFs are designed to replicate their underlying index closely. While small tracking errors can occur, they are generally minimal, allowing investors to anticipate returns relative to the benchmark reasonably. This reliability makes index-based products useful tools for strategic portfolio allocation and long-term planning.

Reliability is not equivalent to guaranteed returns.

Benefits of Index Funds and ETFs in a Portfolio

Index funds and ETFs offer structural benefits that make them useful building blocks in any portfolio:

• Diversification and reduced and single-security risk:: Through index tracking, one investment exposes the investor to dozens or hundreds of companies. This minimises the effect of the low performance of a single stock.
• Compounding effect in the long-term: Minimal trading costs and low management fees mean that more of your money remains invested. In the long run, even minor variations in costs can be multiplied into massive savings.
• Less dependence on decisions by fund managers: Both ETFs and index funds are passively managed:
  • The returns are dependent on the market rather than the stock selection of a manager.
  • No speculation or timing of the market.
• Suitability across market cycles: Index funds and ETFs are constructed to be predictable rather than predictive. They seize expansion in emerging markets and indicate falls in market corrections. Their exposure to the broad market in the long run averts short-term volatility. All investments are subject to market risk.

Together, these advantages make index funds and ETFs dependable, low-effort instruments to be involved in the growth of the market and control the risk and cost at the same time.

Risks and Limitations You Must Consider

Index funds and ETFs have numerous benefits, but you must also consider these risks and limitations when investing in them:

1. Market Risk is Here to Stay

Both ETFs and index funds track the larger market. When the market declines, the fund or ETF will also decline. This means that they won't be able to hedge against general market falls. The systematic risk exposes investors to all securities in the index.

2. Tracking Error and Expenses

Even though it is meant to imitate an index, minor deviations are possible. Tracking error occurs when the performance of the fund is not the same as the index because of operational or timing reasons. Minor management costs and charges decrease returns relative to the unmanaged index. In the long run, these differences are typically small but must be taken into consideration.

3. Liquidity (Particularly ETFs)

ETFs are dependent on the liquidity of the market in terms of buying and selling. The market price can be different from the net asset value (NAV) in thinly traded ETFs. In low-volume ETFs, it may also be difficult to sell large volumes within a short time. This is not the case with index funds, which are redeemed directly at the fund house.

4. Not Built to Beat the Market

Index funds and ETFs are managed passive. It means that they do not strive to outcompete the market. There is a possibility of short-term underperformance compared to active funds. They are meant to give stable, market-linked returns rather than alpha generation.

Conclusion

Index funds and ETFs are long-term, not short-term investment tools. They provide a systematic means of investing in market growth. Although, as with any investment, they are most effective when they are in line with your investing objectives, timeframe, and risk-taking.

Investors should consider their objectives, time horizon, and risk tolerance before investing. Platforms such as Dealing.com may provide access to global ETFs and index funds; however, investments involve risk and are subject to market fluctuations.

Disclaimer: This content is for educational purposes only and does not constitute investment advice, personal recommendations, or a solicitation to buy or sell financial instruments. All investments involve risk, including potential loss of capital. Investors should consult professional financial advisors and consider their personal circumstances before making any investment decision.